38 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[38 



TABLE 23 



Rana clamitans Series 3676-3765 

 Comparison of first and second regeneration Age factor eliminated 



One-sixth of tail removed 



First 

 regen- 

 eration 



Second 

 regen- 

 eration 



Catalog 

 number 



3708 

 3726 

 3762 



Average 



3678 

 3684 

 3702 

 3720 

 3756 



Average 4.9 



Re- 

 moved 

 length 



mm. 



5.3 

 4.3 

 4.1 



4.6 



5.0 



5.5 

 4.7 

 4.6 

 4.8 



Av. length — First regen. 



Av. length — Second regen. 



Increase or decrease 



Specific Ig. — First regen. 



Specific Ig. — Second regen. 



Increase or decrease 



